The Mika-zuki-geri, or crescent kick, is a powerful martial arts technique used in karate. It involves a sweeping, arcing kick directed at the opponent's outer thigh or iliotibial band. This move is effective for disrupting the opponent's posture, causing them to lose balance, and creating openings for follow-up techniques. Proper execution requires precise foot placement, controlled hip rotation, and maintaining balance throughout the motion to ensure both effectiveness and safety.